Exhaust-valve mechanism for internal-combustion engines.



F. H. LEINWEBER. DECD.

C. H., W. H. & V. H. LEINWEBER, EXECUTORS. EXHAUST VALVE MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAR. 5.19l].

Patenmd. Mari'll. 1919.

it)? A TTORNEY,

' UNITED STA'QEQPATENT onnion.

FREDERICK II. LEIIN'WEBER, OF CHIGAGO, ILLINOIS; CURTIS H. LEINWEBEE, XVILLIAM H. LEIN'WEBER, AND VICTOR H. LEINWEBEE EKECUTQRS DE SAID FREDERICK H.

LEINWEBEB, DEGEASED.

EXHBIUST-VALVE MECHANISM INTERNAL-CGMBUS'IION ENGINES.

Specification of Letters I'atent.

Patented Mar. 11, 1919.

original application filed November 5, 1916, Serial No. 129,571. Divided and this application filed March 9, 1917. Serial IQ'c. ween.

To all wlwmit may concern:

Be it known that L'Fnnonmcn l-l. LEIN- wnenn, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in EXhaust-Valve Mechanisms for Internal- Combustion Engines, of which the follow ing is a specification.

My invention relates to improvements in internal combustion engines and more par ticularly to an improved valve arrangement and means for operating the same for em hausting said engine, the object of the invention being to provide such an improved valve arrangement which is simple in construction and ellicient. in. operation, the present application being a division of my prior application filed November 6. 1916, Serial No. 129,871.

The invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification. and in which,

Figure 1 is a vertical section taken through an engine equipped with valve mechanism, embodying my invention,

Fig. 3, a section taken on line 22 of Fig. 1, v Fig. 3, a side elevation, shown partially in section, of the lower portion of the engine taken at right angles to Fig. 1,

Fig. 4, an enlarged section taken on line of Fig. 3

Fig. a sction taken on line 55 of Fi 1 ig. 6, a section taken on line 6-6 .of

Fig. 1,

Fig. 7 an enlarged motion tassn on line 'l-T of Fig. 1, and

Fig. 8, a sectional View illustrating a modified form of valve construction.

The form of construction illustrated in Figs. 1 to 7 inclusive. comprises a closed crank case 9 having a comparatively large cylinder IOattached thereto. A piston ll operates in cylinder 10 and is connected by means of a connecting rod l2 with a cran shafilS in crank case 9. A comparatively small cylinder 14 is arranged coaxially with cylinder 10 and a piston cylinder 15 operates in cylinder 14, the same being connected with the piston 11, as shown. A. stationary piston 16 is arranged to operate in piston cylinder 15 and the cylinder 14 is provided with an inwardly extending head 17 equipped with. spark plugs 18, the piston cylinder 15 being also equipped with spark plugs 19: Cooperating with the piston 11, cylinder 14, piston cylinder 15 and stationary piston 16 are suitable ports and passages in the walls in the respective cylinders and pistons (not shown) arranged tosupply three different forms or grades of fuel to the upper operative end ofcylinder 1 at the proper times in the cycles of operations and to explode and ignite said charges. These ports and passages, and the operation thereof, and of the cooperating parts are fully set fort-h and described in my co-pending application, Serial No. 127,291, filed October 23. 1.916, and require no further description or explanation herein, the present application relating solely to the exhaust valve mechanism, which is operable equally well with other and well known types of pistons and cylinders.

The cylinder 14- is provided with a plurality of exhaust ports 20 in the outer walls thereof and a sleeve valve 21 is arranged to reciprocate on cylinder 14 and is provided with ports 22 arranged to register with ports 20 to eil ect exhaust of cylinder 14. The sleeve valve 21 is normally held in elevated or valve closing position by means of a com pression springflil. and the lower end of said sleeve valve is provided with an annular piston 24 operating in an annular cylinder 25 surrounding the engine cylinder 14: and formed hy a sleeve :28 adjustably secured in position surrounding the lower .portion of sleeve valve 2 and the corresponding portion of engine cylinder 14. A pluralityoi exhaust ports 97 are provided in the Wall's-of sleeve valve 21 and a plurality of pistoncontrollcd ports 25 are arranged to admit pressure from the engine cylinder 14 to the upper end of cylinder 25. at or near the end of the operative stroke of piston cylinder l the arrangement being such that. the

- ing the upper -This furnishes a-slightly d1 mo ern of engine cylinder 14 will thus serve to automatically depress sleeve 2-1 causing ports 22 to register with and open the exhaust valves 20 at or near the end of the operative stroke of piston cylinder 15. By adjusting the sleeve 26 vertically, the 27 may be arranged to be uncovered at dil"- ferent times in the stroke of the sleeve valve 21 to exhaust the cylinder 25 as desired.

At its upper end the valve sleeve .21 is provided with another annular piston op erating in an annular cylinder 29 surround end of engine cylinder 14 which is extended for this purpose. Foo haust ports 30 are formed in the walls of cylinder 29 and vertical. admission passages 3] are formed in the inner walls of valve sleeve 21 between ports 22, theolower ends of the passages 31 being provided With transverse extensions; arranged to conmnuiicate with the exhaust valves 20 upon. initial. downward movement of thesleevc valve A guard sleeve is adjustably secured to sleeve valve 21. to en'ibrace the outer wall of cylinder-'29 and control the ports 30 therein,

a set screw 3-1 permitting of adjustment of said guard sleeve By this arrangemenh it will be observed that upon initial dowir ward movement of the sleeve valve 21 under the influence of the combustion pressure in the engine cylinder 14, the con'lbustion pres-- sure in said cylinder will also be admitted to the cyl nder 29 to complete the downward or operative movement of sleeve valve Ell. By adjusting the guard sleeve 33 the exhaust of cylinder 29 may be regulated as desired.

In the modified form of col struction illu.--=- trated in 8, a sleeve valve provided with ports 36 arranged to i exhaust ports 20 in cylinder ll, .w rid sleeve valve being pmwlded with guide rods 37 and compression springs 38, as indicated for normal y holding the same in valve closing; position and guiding the movements thereof. At its lower end the sleeve valve 35 provided with an annular piston 39 operating in an annular cylinder 4-0 su 'iplied with pressure from engine cylinder ll by iuea s ol a pis ton-controllcd port all). Cylhidcr --O is pro vided with exhaust ports ll. zontrolled by an adjustable guard sleeve irulicalcd. t arrange-- nient controlling the cxhaus oi the eyl inder by means oil the internal pressure thereof".

In both of the constructions above described, air under pressure is su niliod from cylinder 10 as is more fully set forth in copending applications. Cylinder i0 is pro-- exhaust ports register with the vided with a plurality of ports 43 in the walls then-rofland a sleeve 44 is made ad'ustable thereon to control said ports. I desired, the sleeve 44 may be connected with the sleeve 26 compelling simultaneolis move- .ments thereof. By this means the supply of compressed air supplied by cylinder 10 may be adjusted and when the sleeves are connect ed together the supply of compressed air may be regulated to correspond with the exhaust.

lVhilel have illustrated and described the preferred forms of construction for carrying my invention into effect, these are capeble 0 variation and modification without departing from the spirit of the invention. I there'lbre, do not wish to be limited to the precise details of construction set forth, but

desire to avail myself of such variations and 1. The combination with an internal combustion engine cylinderhaving one or more ports in the walls thereof, of a sleeve valve controlling said ports; vieldable means for normally holding said s eeve in port-closing g iosition: an annular cylinder surrounding said engine cylinder; an annular iston on said sleeve valve operating in saic annular cylinder; a piston-controlled port adapted to admit pressure from said engine cylinder to said annular cylinder; a plurality of pistoncontrolled ports a 1: different positions in said annular c \,linder and arranged to be succcssivcly opened by the piston therein; and an adjustable sleeve surrouiuliug said annular cylinder and controlling the port therein, substantially as described.

The combination with an internal combastion engine cylinder having one or more ports in the walls thereof, of a sleeve valve controlling said ports; a spring normally holding said sleeve in 'port-closing position; moans fox-imparting initial valve o 'icning movement to said sleeve; and pressure operable means controlled by said valve for com-- plcting the opening operation thereof, substantially as described.

ln testimony whereof I have signed my name to this s 'iccification in the presence of two subscribing witnesses.

FREDERICK H. LEINWEBER.

Witnesses 

